enetc: Add RFS and RSS support

A ternary match table is used for RFS. If multiple entries in the table
match, the entry with the lowest numerical values index is chosen as the
matching entry.  Entries in the table are identified using an index
which takes a value from 0 to PRFSCAPR[NUM_RFS]-1 when accessed by the
PSI (PF).
Portions of the RFS table can be assigned to each SI by the PSI (PF)
driver in PSIaRFSCFGR.  Assignments are cumulative, the entries assigned
to SIn start after those assigned to SIn-1.  The total assignments to
all SIs must be equal to or less than the number available to the port
as found in PRFSCAPR.

For RSS, the Toeplitz hash function used requires two inputs, a 40B
random secret key that is supplied through the PRSSKR0-9 registers as well
as the relevant pieces of the packet header (n-tuple).  The 6 LSB bits of
the hash function result will then be used as a pointer to obtain the tag
referenced in the 64 entry indirection table.  The result will provide a
winning group which will be used to help route the received packet.

Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/net/ethernet/freescale/enetc/enetc.h b/drivers/net/ethernet/freescale/enetc/enetc.h
index c44e6be24038..b274135c5103 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.h
+++ b/drivers/net/ethernet/freescale/enetc/enetc.h
@@ -128,6 +128,8 @@ struct enetc_si {
 
 	int num_rx_rings; /* how many rings are available in the SI */
 	int num_tx_rings;
+	int num_fs_entries;
+	int num_rss; /* number of RSS buckets */
 	unsigned short pad;
 };
 
@@ -158,6 +160,11 @@ struct enetc_int_vector {
 	struct enetc_bdr tx_ring[0];
 };
 
+struct enetc_cls_rule {
+	struct ethtool_rx_flow_spec fs;
+	int used;
+};
+
 #define ENETC_MAX_BDR_INT	2 /* fixed to max # of available cpus */
 
 struct enetc_ndev_priv {
@@ -175,6 +182,8 @@ struct enetc_ndev_priv {
 	struct enetc_bdr *tx_ring[16];
 	struct enetc_bdr *rx_ring[16];
 
+	struct enetc_cls_rule *cls_rules;
+
 	struct device_node *phy_node;
 	phy_interface_t if_mode;
 };
@@ -205,6 +214,8 @@ int enetc_open(struct net_device *ndev);
 int enetc_close(struct net_device *ndev);
 netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev);
 struct net_device_stats *enetc_get_stats(struct net_device *ndev);
+int enetc_set_features(struct net_device *ndev,
+		       netdev_features_t features);
 /* ethtool */
 void enetc_set_ethtool_ops(struct net_device *ndev);
 
@@ -212,3 +223,8 @@ void enetc_set_ethtool_ops(struct net_device *ndev);
 int enetc_set_mac_flt_entry(struct enetc_si *si, int index,
 			    char *mac_addr, int si_map);
 int enetc_clear_mac_flt_entry(struct enetc_si *si, int index);
+int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse,
+		       int index);
+void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes);
+int enetc_get_rss_table(struct enetc_si *si, u32 *table, int count);
+int enetc_set_rss_table(struct enetc_si *si, const u32 *table, int count);